Adamantylation and Adamantylalkylation of Amides, Nitriles and Ureas in Trifluoroacetic Acid
作者:Elvira Shokova
DOI:10.1055/s-1997-1304
日期:1997.9
A new preparative method for N-adamantylation of carboxylic acid amides, ureas and for C5-adamantylation of barbituric acid in trifluoroacetic acid (TFA) is proposed. Tertiary 1-adamantanols and 1-(1-adamantyl)alkanols were used as adamantylating agents. The reaction of 1-(1-adamantyl)alkanols with nitriles in TFA solution was employed for the first time for the preparation of N-[1-(1-adamantyl)alkyl]amides.
Preparation of Novel Di-isoxazolines Using Bis(nitrile oxide) 1,3-Dipolar Cycloaddition Methodology
作者:Mohammad Ali Bigdeli、Azim Ziyaei Halimehjani、Mohammad Mohammadipour、Parishad Sagharichi
DOI:10.1002/jhet.856
日期:2012.7
A general method for the synthesis of novel di‐isoxazolines through a 1,3‐dipolar cycloaddition reaction of in situ prepared bis (nitrileoxides) of terephthaldehyde and various olefins is described. The reactions are regiospecific and give high yields of products.
Clickable coupling of carboxylic acids and amines at room temperature mediated by SO<sub>2</sub>F<sub>2</sub>: a significant breakthrough for the construction of amides and peptide linkages
作者:Shi-Meng Wang、Chuang Zhao、Xu Zhang、Hua-Li Qin
DOI:10.1039/c9ob00699k
日期:——
carboxylic acids with amines was developed for the synthesis of a broad scope of amides in a simple, mild, highly efficient, robust and practical manner (>110 examples, >90% yields in most cases). The direct click reactions of acids and amines on a gram scale are also demonstrated using an extremely easy work-up and purification process of washing with 1 M aqueous HCl to provide the desired amides in
Indium-Triflate-Catalyzed Ritter Reaction in Liquid Sulfur Dioxide
作者:Daniels Posevins、Krista Suta、Māris Turks
DOI:10.1002/ejoc.201600013
日期:2016.3
as a reaction solvent facilitates the Ritterreaction between alcohols and nitriles. In(OTf)3 was found to be a viable catalyst for this transformation. The newly developed catalytic conditions for the Ritterreaction were successfully applied to the synthesis of various amides, which were formed in good to excellent yields. The catalytic activation of secondary alcohols for Ritterreactions in liquid
An efficient solvent-free synthesis of amides by Ca(II) catalyzed Ritterreaction has been reported under microwave irradiation. This green protocol tolerates the substrate diversity and delivers the high yielding amides with minimal loading of inexpensive and more abundant Ca(II) catalyst.